Board Thread:Pokémon Help/@comment-31379122-20170923221657/@comment-30804097-20170926001608

It means it's good.

Mega Salamence has a pretty good bulk, having 130 Def, 95 HP, and 90 Sp. Def, so Roost isn't really that bad. Also, you can predict and survive some Rock-type or Electric-type moves with it and play games against Sucker Punch.